Half to fred c



(No Model() J. R.. RUSSELL'.

ORE FEEDER.

i Unis Sterns Parenti tric.

JOI-IN R. RUSSELL, OF SAN FRANCISCO, CALIFORNIA, ASSIGNOR OF ONE- HALFTO FRED C. KELLER, OF SAME PLACE.

' ORE-FEEDER.

SPECIFICATION forming part of Letters Patent No. 466,881, dated January12, 1892.

Application led September 8, 1891. Serial No. 405.133. (No model.)

To @ZZ whom it may concern:

Be it known that I, JOHN R. RUSSELL, a citizen of the United States,residing in the city and county of San Francisco, State of California,have invented an Improvement in Ore- Feeders; and I do hereby declarethe following to be a full, clear, and exact description of the same.

My invention relates to that class of orefeeders in which the device isplaced in communication with the mortar of the stamp-battery and isoperated by the drop of the stamps through the contact of the tappet ofthe stampstexn with suitable power-transmitting connections.

My invention consists in the novel details of constructionand-arrangement hereinafter fully described, and specifically pointedout in the claims.

The general object of my invention is to provide a simple, effective,and automatic orefeeder.

Particular objects and advantages will be hereinafter set forth inconnection with the description of the several features.

Referring to the accompanying drawings for a more complete explanationof my invention, Figure 1 is a perspective view of my orefeeder. Fig. 2is a vertical longitudinal section of same.

A is the frame or stand of the device, adapted to be located in properposition with respect to the mortar of the battery, as usual. Secured tothis frame or stand is the fixed feed-barrel B, which is locatedhorizontally and is open at both ends. Though this barrel may have anysuitable shape, I have here shown it in the shape which I deem the bestand which of itself constitutes an improvement-namely, having itsforward portion outwardly iianged or conical, as shown, and its rear endcylindrical.

C is the hopper, supported in the upper portion of the frame or stand`and having its lower end in communication with the barrel.

D is a shaft mounted in the frame or stand and extending through thelongitudinal axis of the barrel. Upon this shaft and located andoperating within the back or cylindrical portion of the barrel is thepusher-plate E, which consists of a band or ring having a hub by whichit is fitted upon and secured to the shaft D and rotates with it. Thispusherplate is mounted with respect to the shaft and the barrel at aninclination, as shown, where,

by it acts during its rotation as a screw or propeller for forcing theore forward in the barrel.

Firmly secured to the forward end of the shaft D is the regulating-plateF, smaller in diameter than the diameter of the front of the barrel andhaving projecting from its rim arms f, which overlap and bear upon theface of the barrel, forming guides and also leaving feed spaces Gbetween them and around the rim of the' plate. When wet or sticky ore isbeing fed, I secure to the inner side of this regulating-plate thescraper-arms H, which extend inwardly into and play over the innersurface of the barrel, said arms being on a curve, as shown, wherebythey act to continually force the wet or sticky ore forward to itsdischarge. These arms, however, may be readily removed, as they are notrequired when feeding dry ore or ore which has no tendency to stick.

The connections for operating the shaft D are as follows: I is a ratchetupon said shaft. Pivoted upon the shaft is a pawl-carrier J, to which isconnected a'pawl K, adapted to e'ngage the ratchet. Pivoted to the sidesof the frame A at the points lare levers L, which eX- tend forwardly andupwardly and have secured between their forward ends the cross`- bai` M.Upon this cross-bar is secured the presser-arm N, said arm extendingforwardly and lyingbeneath and in the path of the tappet 0 on the stampstem O. This presser-arm is mounted upon the cross-bar M adj ustably, sothat it may be raised or lowered or may be moved sidewise and be set inposition by means of a screw n. The first adjustment enables it to beregulated to proper position for any height of tappet, and the secondadjustment enables it to be set under any of the tappets of thestamp-battery.

The rear ends of the levers L are connected by links P with frames Q,mounted and adapt- 'ed to slide vertically upon standards R, rising fromthe stand A. These frames are held down by means of springs S on thestandards, which said springs have their upper IOO ends bearingv againstadjustable nuts s on the standards and their lower ends bearing againstthe bases of the frames. The springs can have their tensions regulated,as required, by setting the nuts up or down.

The end of the pawl-carrier J is slotted through one ofthe frames Q, asshown at q.V

Upon the rear end of the'shaft D, lI have shown a pulley T, in order toillustrate the means for applying a belt power to the feeder,l

if desired.

The operation of the machine is as follows:V

The ore is placed in the hopperand is fed by it down into the barrel B.The rotation of the shaft D within the'barrel causes the ro tation ofits pusher-plate E, which said plate constantly forces theoreforwardin'the barrel toward and out through its discharge end intothe mortar. At this discharge end the feed of the ore is properlyrestricted and regulated by the plate F, through the rim-apertures G ofwhich itpasses in proper quantities. When wet or sticky ore is beingfed, the scraper-arms Il are attached to the regulating-plate, and theyserve to assistand posiing downwardly the presser-arm is kept in aposition directly under the stamp-tappet;` or, in other words, the armfollows the movement of the tappet up and down and bears againstA itallthe time.

In the ordinary machines of this Vclass the striker-arm does not followthe tappet, but

has its'own limits of movement, so that the' tappet strikes it a'blow atevery d rop; but' with my connections the movement is not de-: pendentupon a blow, but the arm follows the tappet up by reason of the springsS andl moves down `under the fall of the tappetn This provides for astrict self-feed for the rea' son that the mechanism will operate onlyac-il cording to the movement of the stamp and within its limit, sothat'if the mortar be crowded under said stamp it cannot move the devicesufficiently to effect its operationuntil the ore has been distributedfree of the;

stamp. This construction, by.' avoiding all striking, prevents the usualjarring and racking ofthe feeder.

I-Iaving thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. In an lore-feeder, the combination of a feed-barrel having an openforward end in communication with the mortar of thestampbattery, ahopper above the barrel and communicatin g therewith, arotary shaftmounted in the longitudinal axis of said barrel, and the inclinedpusher-plate mounted upon the shaft at a point back of the communicationbetween the hopper and the barrel and rotating with said shaft,substantially as herein described.

2. In an ore-feeder, the combination of a feed-barrel having an openforward end in communication with the mortar'of` the stampbattery, afeed-hopper located above and communicating with said barrel, a rotaryshaft mounted in the longitudinal axis of said barrel, the inclinedpusher-plate mounted upon the shaft at a point back of the communicationof the hopper with the barrel and rotating with said shaft, and theapertured regulating-plate mounted on the forward end of the shaft andoperating over the discharge end of the barrel, substantially as hereindescribed. l

3. In an ore-feeder, the lcombination .of a feed-barrel having an open'forward end in communication with the mortar ofthe stampbattery, afeed-hopper located above and communicating with said barrel, a rotaryshaft mounted in the longitudinal axis of said barrel,.the inclinedpusher-plate mounted upon the shaft at aY point back of thecommunication of the hopper with the barrel and rotating with saidshaft, and the apertured regulating-plate mounted on the' forward end ofthe shaft and operating over'the discharge end of the barrel, said platehavin-g radial arms extending from its rim and bearing on the forwardend of the barrel, substantially as herein described. v

4. In an ore-feeder, the combination of the feed-barrel having theoutwardly-Haring or conical forward end, a rotary shaft therein,

an apertured regulating-plate on the forwardv end of the shaft, andthecu'rved scraper-arms secured to said. plate and operating overtheinterior of the conical end of the barrel, sbstantially as hereindescribed.

5. In an ore-feeder, the combination ofthe feed-barrel having anoutwardly-'flaring or conical, forward end, the rotary shaft mountedlongitudinally therein, the inclined pusherplate on said shaft operatingwithin the rear end ofthe barrel, `the apertured regulatingplate ontheforward end of the shaft controlling the discharge end o f thebarrelvandthe curved scraper-arms secured to said plate and operating over theinnersurface of said barrel, substantially as herein described. g

6. In an ore-feeder, the ratchet, vibrating pawl-carrier, and-pawlforoperating the feeding mechanism, in combination with the slidingframes operating said pawl-carrier, the springs for holding said-framesdown,the pivoted levers connected with said frames, and the presser-armconnected with said levers and adapted to bear constantly under thestamp-stem tappet, substantially as herein described. n I

7. In an ore-feeder, the feed-barrel having the rotary shaft, andsuitable, feeding devices upon said shaft, in combination with vthemeans for operating the shaft, consisting of IOO IIO

the ratchet on the shaft, the pawl-carrier having the pawl engaging theratchet, the verti-4 cally-movable frames with which the pawlcarrier isconnected, the springs for holding said frames down, the leversconnected with the frames, the cross-bar between the forward ends of thelevers, and a presser-arm on said cross-bar, substantially as hereindescribed.

8. In an ore-feeder, the barrel, the shaft passing through it, theinclined pusher-plate on said shaft operating within the rear end of thebarrel, and the apertured regulatingplate on its forward end, operatingover the forward end of the barrel, in combination with the means foroperating the shaft, consisting of the ratchet on the shaft, th'epawlcarrier having the pawl engaging the ratchet, the vertically-movableframes with which the pawl-carrier is connected, the springs for holdingsaid frames down, the levers connected with the frames, the cross-barbetween the forward ends of the levers, and a presserarm on saidcross-bar, substantially as herein described.

In witness whereof I have hereunto set my hand.

JOHN R. RUSSELL.

